| abstract |
A cylinder lubricating oil composition for a cross-head type diesel engine containing a base oil for a lubricating oil and (A) an ashless dispersant, characterized in that it comprises (A1) an ashless dispersant having a boron content of 1.5 mass % or more and/or (B) a silicone oil having a kinematic viscosity of 100 to 350,000 mm2/s at 25°C. The above cylinder lubricating oil composition exhibits, in addition to conventional performance capabilities, improved resistance to wear and seizure, and also can be produced at a lower cost. |